I believe as long as you have access to view it and it is public then it should not be a problem.
I’m getting a 404 error when I try to update the page:
While trying to retrieve events, Google returned an error:
Error calling GET https://www.googleapis.com/calendar/v3/calendars/k6ltlq7k7mcck2hg2t6h5dk4l4%40group.calendar.google.com/events?singleEvents=true&maxResults=2500&timeMin=2015-12-11T00%3A00%3A00%2B00%3A00&timeMax=2016-03-12T23%3A59%3A59%2B00%3A00&key=AIzaSyD-1fahe2SFskh1YFcMwLmDYsYGOKSPr3Y: (404) Not Found
Please ensure that both your Google Calendar ID and API Key are valid and that the Google Calendar you want to display is public.
Is the calendar being shared set to be public?
I am going to assume this has been resolved since there has not been a reply here. If you have any other issues please let us know and we will be happy to help.
Thanks!